Transmission



Aug.. 14, 192s;

Tmmsmssron` Filed Aug. 12, 1927 Jagd;

INVENTOR l aw/'efr e L 5220/7*- Patented fitug., lll, i928..

LAWRENCE L. STllll/'Alwl'ly OF KANSAS CETY, MISSOURI;

TRANSMISSION.

Applicationy sied August 12, 1927. serial no. 212,493.J

-My invention relates to transmissions and particularly to means forcombining different types of change gear sets, the immediate objects of the invention being -to increase the range of gear ratios and thus the efficiency ofv motor vehicles normally equipped with the planetary type of transn'iission.

lin accomplishing this object l have pro vided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a longitudinahvertical sectional view of a selective type transmission and means of associating rthe same with reprelsentative, elements of a planetary transmission.

F ig. 2 is a perspective-view of an adapter for positioning between the two change gear sets.

for positioning between an interposed gear set and the universal housing.

F ig` 4 is a perspective view of a sleeve joining the stub shaft portion of the rearwailgd universal joint with the main drive sha t.V

Referring more in detail tothe drawings: j

1 designates generally la planetary-type transmission, including a member 2 lwhich delivers the power from the Vplanetary transmission having a socket 3, and a housing 4 having a peripheral flange A universal jointV represented by the casing '6 having a mating flange 7 is ordinarily secured to the planetary transmission housing 4, a squared stub shaft 8 of a universal joint member 9 in ordinary practice being received by the socket of the transmission member 2 for rotation of said squared shaft by the transmission. j

My invention involves the introduction of a selective change gear set or transmission 10 between the planetary transmission l and Athe universal joint 6 so that the selective sliding gear set may add theradditional number of its gear changes .to the range of gear ratios provided by the planetary transmission. The selective transmission 10 which is illustrated in the drawings isv ausual form comprising a casing 11 having a front wall 12 and a rear wall 13, the walls being provided withthe aligned openings 14-14 and F ig. 3 a perspective view of an adapter Y the selective set a universal joint element 19 having a sleeve-ended shaft member 19', which is journaled in the Abearing 18 and re- ,ccivcs rotatably the forward end of the transmission shaft 16.

The bearing openings 15-15' are provided for journaling the counter or lay shaft 20, on which fixed gears are provided as usual for selective meshing with sliding gears on the transmission shaft.

The selective sliding gear set is supported by and connected tothe planetary transmission elements and the universal 6, by means including` two adapters, a short front adapter 21 and a longer rear` adapter 22. The front adapter serves as a housing for the interposed universal joint, and is provided with a forward annular external flange 23 for mating with the annular flange 5` of the planetary transmission housing 4 and is secured thereto by bolts 24; the 0pposite end of the adapter having an internal annular flange 25 constituting a journal for the sleeve member 19 in co-operation with the bearing 18 of the selective transmission; and having in its rear face anannular recess 26, to receive an outstanding annular flange 27 of the front wall of the selective transmission, the front adapter and the selective transmission casing being securely connected by bolts 2S extending through said flanges 25 and 27.

The rear and longer adapter 22 is sub stantially identical with the front adapter, except in length, having an exterior annular flange 29 for securing the adapter by bolts 30 to the mating flange 7 of the universal joint casing 6; and an .internal bearing flange 31 to receive the transmission shaft, in which flange is a facing annular recess 32 to receive an outstanding annular flange 33 of the rear wall 13 of the selective transmission casing. Bolts 34 extending through the flanges of the adapter and the rear wall 13 secure the two members, to complete the arrangement whereby the selective type liti transmission element is incorporated in the transmission assembly of the vehicle.

rIhe transmission shaft 16, which may be the conventional transmission shaft of a se lective transmission, has a squared rear end 35. In my invention the shaft 16 and its squared end 35 are aligned witlirand positioned adjacent the squared shaft portion 8 of the universal joint member 6, and a cy-V lindrical coupling member 36 having a squared axial opening 37 is seated as a sleeve member Vov r the aligned and adjacent ends ofsaid squared shaft elements 35 and 8 and connects the two, enabling the transmission shaft to actuate theuniversal joint member.

Ayehicle may thus be provided with both a planetary type of transmission and a selective sliding gear type transmissiointhe selective transmission being interposed between the planetary transmission housing andthe universalfjoint casing, and a second'universal joint being installed between theplanetary set and the'sliding gear set. The adapters are of suitable length for litting in the situations for which they are connected with the planetary transmissionv elementsand universal jointl for effective operation; the delivery or transmission shaft being keyed with the universal joint stub by means of the coupling sleeve. The actuation of t-he planetary transmission normally provided for the vehicle,vat one of the several speeds provided therefor, for eX- ample, two speeds forward andone reverse, causes the rotation of the sleeve 20 and driving gear 38 at a selected speed.l The gear 38 actuates the elements of the selective gear set in the usual manner, whereby the speed is further modified, anddifferent gear ratios provided for power purposes, either throughY increasing or decreasing the speed transmitted from the planetary set. The

speed so modified is delivered through the squared end of the transmission shaft to the sleeve member and by it to the squared shaft portion of the universal joint member for delivery to the axle.

Thus it is apparent that the means of as#V sociating a selective type change gear setV 'with a planetary transmission provides additional forward and vreversespeeds for the vehicle equipped originally withthe plann etary transmission. Y

lVhile l'have described my device as comprising adapters combining'a selective sliding gear set with a planetary system, using the Yorigina-l elementsof the two sets, the disclosure will suggest to persons of ordinary skill the application of the invention to other elements, and the use of members more radically modified or theuse of substitute members.v For example, other thanv the named conventional transmission elements may be combined or a special shaft` may be provided to .serve in the place ofthe Vuniversal oint to'lsuit a particular condition. v

What l claim and desire to secure by Letters Patent is:` j

An adapter having an exterior annular flange for attachment to a transmission housing, an internal annular flange for attachment to a secondtransmission'housing, and a bearing opening to receivejfthe driving member of the secondnamedtran'smission. lntestimony whereof I affix my signature.

` f LAWRENCE L. STEWART. 

